Free guide
Alt text decision tree
Not every image needs a description. Answer a few questions and we'll tell you exactly what to put in the alt attribute, based on the W3C WAI decision tree.
Question 1
Does the image contain text?
For example a logo, a quote graphic, a button label or a banner with words on it.
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Adapted from the W3C WAI alt decision tree. This guide doesn't cover every case, and the page author makes the final call.